Liaocheng Hongyu Metal Co.,Ltd is located in the Liaocheng City , Shandong province , which was building in 1997 and with its own trading company –QingDao DukYang Trade Co.,Ltd , which was set in 2005 .And we pay more attention to international trade and cooperation Our company is the main manufacture of all kinds of plain washers , spring washers , bolts , nuts and stamping parts, as a whole , washer and stamping parts is our competitive products . The washers are in DIN, NFE,JIS,KS,USS, and we can also produce the special washer accordint to your order . Our main material is : mild steel , carbon steel , 70# steel , A2, A4, copper , aluminum.ect We have many professional production machines which help us to supply high quality products and reasonable price .Our products quality has been passed the test of the metal washer profession. Our products are exported to Europe , South Africa , Asia ,USA, Middle East and other countries , during these years’ cooperation , we have a large business cooperation website , our products are highly appreciated. Our company goal is with more patient and sincere desire to supply high-quality products to all customers .